Unknown thisMoment Inc presented new killer application, and service getting popular quite fast.
Who they want to kill? All our favorite social networks: Delicious, Facebook, MySpace, Flickr, Twitter.
All the conception behind is:
mark some moment in time
add some data(photos, video, music, text) to that moment
share your moment and look others

thisMoment is the latest creation of a team that has built and managed some of the Web’s biggest consumer properties, including GameSpot, MP3.com and TV.com, and more recently the Yahoo! Entertainment portfolio (Yahoo! Movies, Music, Games, Celebrity, TV and Video) and its Brand Universe initiative.
According to thisMoment
No API, or at least RSS aggregation at this time makes it arguable application for me but it is still Beta.
Look yourself, who knows .. perhaps it will be popular, and you will have problem with cool account name.